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power: supply: wm97xx_battery: Convert to GPIO descriptor

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This converts the WM97xx driver to use a GPIO descriptor
instead of passing a GPIO number thru platform data.

Like everything else in the driver, use a simple local
variable for the descriptor, it can only ever appear in
one instance anyway so it should not hurt.

After converting the driver I noticed that none of the
boardfiles actually define a meaningful GPIO line for
this, but hey, it is converted.

Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Linus Walleij 2021-01-11 00:45:08 +01:00 committed by Sebastian Reichel
parent a3b4388ea1
commit cb6d6918c5
5 changed files with 19 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-pxa/mioa701.c
View File

@ -577,7 +577,6 @@ static struct platform_device power_dev = {
static struct wm97xx_batt_pdata mioa701_battery_data = {
.batt_aux = WM97XX_AUX_ID1,
.temp_aux = -1,
.charge_gpio = -1,
.min_voltage = 0xc00,
.max_voltage = 0xfc0,
.batt_tech = POWER_SUPPLY_TECHNOLOGY_LION,

1
arch/arm/mach-pxa/palm27x.c
View File

@ -212,7 +212,6 @@ void __init palm27x_irda_init(int pwdn)
static struct wm97xx_batt_pdata palm27x_batt_pdata = {
.batt_aux = WM97XX_AUX_ID3,
.temp_aux = WM97XX_AUX_ID2,
.charge_gpio = -1,
.batt_mult = 1000,
.batt_div = 414,
.temp_mult = 1,

1
arch/arm/mach-pxa/palmte2.c
View File

@ -273,7 +273,6 @@ static struct platform_device power_supply = {
static struct wm97xx_batt_pdata palmte2_batt_pdata = {
.batt_aux = WM97XX_AUX_ID3,
.temp_aux = WM97XX_AUX_ID2,
.charge_gpio = -1,
.max_voltage = PALMTE2_BAT_MAX_VOLTAGE,
.min_voltage = PALMTE2_BAT_MIN_VOLTAGE,
.batt_mult = 1000,

45
drivers/power/supply/wm97xx_battery.c
View File

@ -15,11 +15,12 @@
#include <linux/wm97xx.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/irq.h>
#include <linux/slab.h>
static struct work_struct bat_work;
static struct gpio_desc *charge_gpiod;
static DEFINE_MUTEX(work_lock);
static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
static enum power_supply_property *prop;
@ -96,12 +97,11 @@ static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps)
static void wm97xx_bat_update(struct power_supply *bat_ps)
{
int old_status = bat_status;
struct wm97xx_batt_pdata *pdata = power_supply_get_drvdata(bat_ps);
mutex_lock(&work_lock);
bat_status = (pdata->charge_gpio >= 0) ?
(gpio_get_value(pdata->charge_gpio) ?
bat_status = (charge_gpiod) ?
(gpiod_get_value(charge_gpiod) ?
POWER_SUPPLY_STATUS_DISCHARGING :
POWER_SUPPLY_STATUS_CHARGING) :
POWER_SUPPLY_STATUS_UNKNOWN;
@ -171,18 +171,19 @@ static int wm97xx_bat_probe(struct platform_device *dev)
if (dev->id != -1)
return -EINVAL;
if (gpio_is_valid(pdata->charge_gpio)) {
ret = gpio_request(pdata->charge_gpio, "BATT CHRG");
if (ret)
goto err;
ret = gpio_direction_input(pdata->charge_gpio);
if (ret)
goto err2;
ret = request_irq(gpio_to_irq(pdata->charge_gpio),
charge_gpiod = devm_gpiod_get_optional(&dev->dev, NULL, GPIOD_IN);
if (IS_ERR(charge_gpiod))
return dev_err_probe(&dev->dev,
PTR_ERR(charge_gpiod),
"failed to get charge GPIO\n");
if (charge_gpiod) {
gpiod_set_consumer_name(charge_gpiod, "BATT CHRG");
ret = request_irq(gpiod_to_irq(charge_gpiod),
wm97xx_chrg_irq, 0,
"AC Detect", dev);
if (ret)
goto err2;
return dev_err_probe(&dev->dev, ret,
"failed to request GPIO irq\n");
props++; /* POWER_SUPPLY_PROP_STATUS */
}
@ -204,7 +205,7 @@ static int wm97xx_bat_probe(struct platform_device *dev)
}
prop[i++] = POWER_SUPPLY_PROP_PRESENT;
if (pdata->charge_gpio >= 0)
if (charge_gpiod)
prop[i++] = POWER_SUPPLY_PROP_STATUS;
if (pdata->batt_tech >= 0)
prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY;
@ -242,23 +243,15 @@ static int wm97xx_bat_probe(struct platform_device *dev)
err4:
kfree(prop);
err3:
if (gpio_is_valid(pdata->charge_gpio))
free_irq(gpio_to_irq(pdata->charge_gpio), dev);
err2:
if (gpio_is_valid(pdata->charge_gpio))
gpio_free(pdata->charge_gpio);
err:
if (charge_gpiod)
free_irq(gpiod_to_irq(charge_gpiod), dev);
return ret;
}
static int wm97xx_bat_remove(struct platform_device *dev)
{
struct wm97xx_batt_pdata *pdata = dev->dev.platform_data;
if (pdata && gpio_is_valid(pdata->charge_gpio)) {
free_irq(gpio_to_irq(pdata->charge_gpio), dev);
gpio_free(pdata->charge_gpio);
}
if (charge_gpiod)
free_irq(gpiod_to_irq(charge_gpiod), dev);
cancel_work_sync(&bat_work);
power_supply_unregister(bat_psy);
kfree(prop);

1
include/linux/wm97xx.h
View File

@ -294,7 +294,6 @@ struct wm97xx {
struct wm97xx_batt_pdata {
int batt_aux;
int temp_aux;
int charge_gpio;
int min_voltage;
int max_voltage;
int batt_div;